From editor or global species database
Type species The designation of type species is confused. Amphitrite cirrata is regarded as the type species, but strictly it was not named in 1771, when Müller used an unavailable name of Spio cirrata, and mentioned the available name used by Linnaeus of 'cirrosa' (for Nereis cirrosa). In 1777 Müller defined A. cirrata based on his 1771 usage and the Linnaean Nereis cirrosa, but he included five other Amphitrite species, so in 1777 A. cirrata could not be type species by monotypy, or by subsequent designation by Müller (although Müller uses it as the headline species). Nevertheless it is type by subsequent designation as subsequent authors used A. cirrata as the type species. [details]